Delta Electronics VFD-M Series, User Manual

Page: 87 / 173

Chapter 4 Parameters
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4-52 Revision May 2008, ME14, SW V3.04
Carrier Frequency Acoustic Noise
Electromagnetic Noise,
Leakage Current
Heat Dissipation
1KHz
15KHz
Significant
Minimal
Minimal
Significant
Minimal
Significant
From the above table, we see that the carrier frequency of PWM output has a significant
influence on the electromagnetic noise, heat dissipation of the AC drive, and the acoustic
noise to the motor.
Pr.72
Auto Restart Attempts After Fault
Settings 00 to 10 Factory Setting: 00
When this parameter is enabled (set different to zero), the AC Drive will restart/reset
automatically up to 10 times after the occurrence of certain type of faults (over-current OC,
over-voltage OV). If enabled, the AC drive will restart on “speed search”, which begins at
Master Frequency. Setting this parameter to 0 will disable this operation. To set the fault
recovery time after a fault, please see base-block time for speed search (Pr.34).
Pr.73
Present Fault Record
Pr.74
Second Most Recent Fault Record
Pr.75
Third Most Recent Fault Record
Factory Setting: 00
Settings 00 (no fault occurred )
01 Over-current (oc)
02 Over-voltage (ov)
03 Overheat (oH)
04 Overload (oL)
05 Overload 1 (oL1)
06 External Fault (EF)
07 CPU failure 1 (CF1)
08 CPU failure 3 (CF3)
09 Hardware Protection Failure (HPF)
10 Over-current during acceleration (OCA)
11 Over-current during deceleration (OCd)
12 Over-current during steady state operation (OCn)